Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 1245 AM EST Tue Dec 24 2019 Valid 12Z Tue Dec 24 2019 - 12Z Thu Dec 26 2019 ...Unsettled conditions will continue for the West Coast... ...Mild temperatures for the mid-Mississippi Valley on Christmas Eve/Day... A frontal system will continue to push through the interior West and Southwest, through the Great Basin and Four Corners region on Tuesday. Though the front is expected to weaken by Wednesday, lingering snow showers will persist for the Rockies. Lower elevation rainfall may exceed a quarter to half an inch over portions of Arizona, which may lead to localized flooding. Heavier amounts are likely in the favored terrain areas (which will fall as snow with levels lowering to about 5000-6000ft). The rest of the lower 48 will see relatively dry and mild conditions as the Southeast system departs the coast. A frontal boundary will waver over the central Plains through the Corn Belt and Great Lakes into the Mid-Atlantic. Southerly flow to the south of the boundary will bring well above normal temperatures to the areas along I-70 between western Kansas to the Appalachians. Record highs are possible on Christmas Day around St. Louis in the lower 60s. Below normal temperatures are forecast for much of the West behind the cold front, only in the upper 50s and low 60s for southern California and the lower deserts of Arizona. Fracasso Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php